Rockworth RW1504ST2-AZ Factory Reconditioned Portable Electric Air Compressor, 4-Gallon, Black 1.5 HP electric engine provides power and consistency 155 PSI maximum pressure Delivers 3.2 SCFM at 90 PSI to run multiple finish nail guns or 1 framing nail gun Twin-stack tank configuration has 2 air outlets for running multiple tools Oil-free pump means no maintenance